September Summary

Near average temperature and rainfall, below average wind run.

(September compared to my records from the past 10 years.)

  • This September close to my average temperature with 9.7C, my September 10 year average is 9.8C
    • The warmest temperature was 26.4C, a new September record. My previous record was 25.9 set in 2016
    • The coldest temperature was -1.4C, the lowest September temperature I've recorded is -2.5C in 2009.
    • Four days recorded a temperature of 0C or below, my average is 2.
    • Two days failed to reach 10C maximum daily temperature, my average is 1.
    • Nineteen days reached or exceeded 15C, my average is 16.
    • Six days reached or exceeded 20C, my average is 5.
    • One day reached or exceeded 25C, my average is 0 though 2 days did in 2017 and 1 in 2008.
  • Wind run was 88% of my average of 4600km with 4077km.
    • The windiest September was 2016 with 5291km.
  • The barometer recorded near average average pressure for the month with 1009.2hPa. My average is 1010.0hPa.
    • Record high pressure was recorded this September with 1041.7hPa, my average maximum pressure is 1031.1hPa
  • Rainfall was near my average expected total of 41.9mm with 42.4mm.
    • The wettest September in the past 10 years is 2014 with 70.5mm.
    • The driest September in the past 10 years is 2009 with 24.7mm
September 2019 Summary
Temperature
Mean 9.7 C
Mean Maximum 15.9 C
Mean Minimum 4.0 C
Maximum High 26.4C (29th)
Maximum Low 8.3 C (5th)
Minimum High 9.0 C (6th)
Minimum Low -1.4 C (8th)
Wind Speed and Direction
Maximum Gust 46 km/h (25th)
Mean 6.0 km/h
Wind Run 4077 km
Max Daily Windrun 358 km (6th)
Prevailing Direction East North East
Barometer
Maximum 1041.7 hPa (20th)
Minimum 984.3 hPa (25th)
Mean 1009.2 hPa
Max Daily Change `+32.9 hPa (17th)
Rainfall
Days with Measured Rainfall
(0.2mm or more)
10
Max Daily Rainfall 9.8 mm (4th)
Monthly Rainfall 42.4 mm
Humidity
Maximum 98 % (5th)
Minimum 28 % (17th)

 

 September Daily Observations
TemperatureWindRainfallBarometer
DateMinMaxMeanMean
(Km/h)
Gust
(Km/h)
Run (km)Prevailing Dir10 Minute Max (mm)Total (mm)Min (hPa)Max (hPa)Change (hPa)
1 1.2 21.2 10.6 2.9 28 66 East Nth East 0 0 1016.0 1023.6 -7.6
Sunny and mild with light winds tending NE.
2 3.9 15.3 10.2 8.1 39 185 East Nth East 0 0 1017.3 1022.5 -5.2
Sunny with a freshening NE wind in the afternoon.
When does spring officially start in NZ? It's complicated
3 3.4 15.7 9.6 3.4 23 76 East Nth East 0 0 1014.8 1018.6 -3.8
Fog and low cloud in the morning clearing to a sunny day with  few clouds. Light NE winds.
4 6.7 11.0 9.8 7.0 31 159 East Nth East 0.8 9.8 997.9 1014.8 -16.9
Low cloud and drizzle from midday with showers in the afternoon, NE wind.
5 8.3 10.4 9.1 9.9 35 227 South West 0.2 1.2 988.9 997.5 -8.6
Light rain and drizzle in the morning clearing for a while but returning later in the afternoon. Southerly winds.
6 6.5 9.0 7.9 15,6 46 358 South West 1.2 9.0 988.6 1001.4 +12.8
Overcast with showers and southerly winds.
7 0.0 10.9 5.9 5.2 30 120 South Sth West 0.4 0.6 1001.3 1005.3 +4.0
Showers clearing by dawn with cloud breaking to a sunny afternoon. Cool southerly winds.
8 -1.4 9.6 4.1 4.0 22 90 South Sth West 0 0 1002.0 1006.5 +4.5
Morning frost. Overcast from early morning with light showers later. Light southerly winds.
9 2.8 10.4 5.9 3.1 24 71 East 0 0 1005.9 1008.1 -2.2
Overcast and cold with variable winds in the morning turning NE in the afternoon.
Snow risk to North Island high routes; temperatures plummet in south
10 2.6 11.5 7.5 7.9 38 172 East Nth East 0 0 1000.0 1007.3 -7.3
Sunny with fresh cool Ne wind.
11 1.9 12.8 6.9 5.6 28 128 South Sth West 0 0 999.6 1010.4 +10.8
Morning cloud breaking to a sunny afternoon with a cool southerly wind turning NE in the evening.
12 1.4 20.5 11.7 4.8 34 109 East Nth East 0 0 1002.0 1009.7 -7.7
Variable high cloud, mild northerlies from midday.
13 6.9 18.2 11.2 6.6 37 151 South Sth West 0.2 1.2 998.2 1013.5 +15.3
Mild northerly winds in the morning followed by a cold southerly change around 11am with a few afternoon showers.
14 5.3 10.2 7.8 2.7 26 60 East 0.4 8.8 1004.9 1013.6 -8.7
Overcast with low cloud and mist. light rain and drizzle throughout the day. Light winds.
15 7.2 12.8 9.1 6.7 25 152 South West 0.2 3.4 1002.4 1005.4 -3.0
Overcast with low cloud, mist and drizzle in the morning. Cloud breaking to a mostly sunny afternoon with southerly winds turning NE.
16 4.3 21.0 13.3 5.1 44 117 East Nth East 0 0 993.2 1004.7 -11.5
High cloud increasing from midday, mild northerly winds from late morning.
17 4.6 17.8 12.0 7.1 44 162 West Nth West 0 0 993.4 1026.3 +32.9
Cloud increasing in the afternoon with a few spots of rain later. Nor'west winds turning NE in the afternoon.
18 3,3 15.1 8.7 4.5 22 104 East Nth East 0 0 1026.3 1032.7 +6.4
Sunny with thin high cloud, Cool NE wind.
19 -0.4 16.9 8.2 3.9 34 88 East Nth East 0 0 1032.5 1036.8 +4.3
Morning frost, sunny with some high cloud in the afternoon with NE wind freshening.
Extremely rare stratospheric warming shows no sign of ending
20 2.8 15.7 9.1 3.8 23 86 South Sth West 0 0 1036.7 1041.7 +5.0
Morning cloud breaking to a sunny afternoon with light southerly winds turning NE later in the afternoon.
21 7.1 16.9 10.5 7.2 29 164 East Nth East 0 0 1034.3 1040.0 -5.7
Morning low cloud clearing to a sunny afternoon with NE wind.
22 7.3 14.4 10.2 8.5 39 194 East Nth East 0 0 1016.6 1034.3 -17.5
Low cloud breaking in the afternoon with sunny intervals and freshening NE winds.
23 4.0 21.5 12.3 4.5 35 103 East Nth East 0 0 999.3 1016.5 -17.2
Variable winds turning mild northerly in the afternoon with high cloud breaking.
24 5.8 17.6 10.3 4.9 26 112 South Sth West 0.6 3.2 994.3 999.2 -4.9
Sunny morning. Cloud increasing from midday with showers in the afternoon. Light southerly winds in the morning, variable breezes in the afternoon.
25 1.8 16.9 7.5 5.7 46 131 East Nth East 0.6 4.0 984.3 995.6 -11.3
Cloud increasing from midday with showers from late afternoon with a cold southerly change.
26 -1.3 18.3 8.8 7.0 38 160 West Nth West 0.2 0.2 991.7 999.2 -7.5
Morning frost. Sunny with mild northerly winds from late morning.
27 5.6 17.9 10.7 4.2 24 95 East Nth East 0 0 999.4 1007.3 +7.9
Morning cloud breaking to a sunny afternoon with NE winds.
28 4.8 21.8 12.6 5.4 40 124 North Nth West 0 0 1003.8 1006.7 +2.9
Overcast with nor'west winds
29 6.4 26.4 16.3 5.2 37 114 North Nth West 0 0 999.8 1007.2 -7.4
Sunny with few clouds, warm northerly winds from late morning.
30 6.2 18.3 12.6 8.1 36 185 South Sth West 0.2 0.8 992.9 1001.5 +8.6
Cloudy with mild northerly winds turning colder southerly by late morning with showers.


September 2019  Temperature Graph
September 2019 Wind Dir Graph
September 2019 Wind Dir Graph
September 2019 Wind Speed Graph
September 2019 Rainfall Graph
September 2019 Barograph
September 2019 Humidity Graph